High4 (; stylized as HIGH4) was a South Korean boy band under the management of N.A.P Entertainment. The group consisted of members Alex, Myunghan, and Youngjun. They officially debuted into the Korea
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a2c6ee2c7a21d19747f602a67cb9e63b4a8bfd6aed0275cb590c7f2d2f9148. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2d2ff763-d703-48c4-b2b3-7481f1f2a55a.json and https://artists.proofprofile.net/proofs/artist/2d2ff763-d703-48c4-b2b3-7481f1f2a55a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a4908e2f2a7e0aad8026d9f59c0d74ce2a3a8534e7ee8bce13cdd14dcf2c9c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRA381700397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2bb14928c14857ecd22e4125efebc4d42ad34aa73bebddbd6b122d557c94d47. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRA381700398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba5cf4fee449e267820637351083eddc3eea0c34cdb793016e13201df3334699. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRA381700396.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a4146ba810abf7f2dfb32b84200042181b90825f2140f3920d655b5e51be1d. Chain 2 (Bitcoin): anchored in block 960355 (2026-07-31T05:49:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRA381700399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc6da32d2d9cfbbb043774dcf8f5bc484fc35d896ed55a75e57ba69502667eec. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRA381700400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb75a05d2a30af02de1dc96b33585288eb8c02173b2d4a395741ad7eab3f525. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRA381700401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c2fc0f28c5986a2986860066744ae31670b95a43591c26da3eaac7c615724d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRA341630879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf43ea194379546bbc9d3f55ba54da5524b0aa9294de7916fda124fff2c6036. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRA341551675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02daa33c0eff6f39381c134614c856b351f2eac9a909066719312e4af091adfb. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRA341524699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee03c279f51efe132e04584aba7f117f27270b0b8c1982256d8832bd6271e98. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRA381209591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb8e63b91b50c53b2834139a7522faeb0b9b0b8f46e098decd63981c324f2555. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRA381208783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf10d787fd3600cdb6f8b589b563d560dd78bb21a6d93127e8b7a9454de6a77f. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRA381208784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1c4f08b4578ad4226bf9df10d52b727913710b62c2ce1688a0a70b23947b63. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRA381208786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d682f87eeca554815d899604794085c1739f90b39c0fcfd2c1d28b7b7d9ec20. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRA381208785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x743dc0d0998b2cd5c76077eed5f308785beb3cc435429875fd5aa0db6bc9310c. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRA381208787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa13a877e3dec89f592627048fe964d4fb9d5276495fc7d11ebcd2677f634187e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRA381208568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa02858f5a4b529b282ade8d89802a66753d0b41dde4c2e921463d6001aad155d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRA381206728.
Not Spring, Love, or Cherry Blossoms (Instrumental)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8506c6a6f0cc2a55e8c0993729429afef36208769e77b5942517fb4a7b2e9e7c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRA381206729.